RunUpgradeSuite runs the actual upgrade tests.

ClusterUpgrade indicates that both master and nodes are being upgraded.

EtcdUpgrade indicates that only etcd is being upgraded (or migrated between storage versions).

MasterUpgrade indicates that only the master is being upgraded.

NodeUpgrade indicates that only the nodes are being upgraded.

UpgradeContext contains information about all the stages of the upgrade that is going to occur.

VersionContext represents a stage of the upgrade.

Skippable is an interface that an upgrade test can implement to be able to indicate that it should be skipped.

Test is an interface for upgrade tests.

UpgradeType represents different types of upgrades.